I went about this in a different way. I boot cm7.1 off a 32GB sd card. The way it is set up is you get 1gb internal on the nook and 1gb on the sd card. To access the additional 31gb of space on the sd card, you have to plug it into the computer and enable usb mode.
So I made folders for ebooks, audiobooks, music, and videos and put them in the cmd7sdcard partition while hooked up to the computer in usb mode. I then sideloaded about 20gb's of files to the different folders.
My next step was to find corresponding apps that could read the files from that location, which is mnt/emmc. For ebooks, aldiko and moon reader could not be pointed to my newly created ebook folder on the large partion. They only looked in the 1gb partitions.
Coolreader, however, could access the folder just fine. The only downside is that Calibre cannot access it, so you have to drag the books over yourself. But that is no big deal for me.
I also found out that
Mortplayer for Audiobooks and
Mortplayer for Music can also read directly from the big partition.
MX Video Player can access the video files from there as well.
This setup allows me to keep the 1gb internal Nook storage and the 1gb sd card partition available just for apps. All my media is stored on the 31gb partition on the sd card.
I also found out that
Titanium Backup can be set to use the large partition, saving space and making it easy to grab a copy and store it on my computer.
I could go on and on about overclocking, undervolting, V6 Supercharger, etc. which turns our little reader into a very capable tablet. But I am sure you already know about all that.
So unless you really need to use Aldiko, I find Coolreader to be a very versatile app for ebook reading. There are tons of settings to play around with. Night Mode is great. I set it to red text on a black background.
Regards,
Greg